The sweet & sour is definitely free - neither of you have included rice as a Free Food when you entered the data so it inevitably calculates at 1 syn per 20 calories so makes it the same on all plans.
Rice Time values on EE/Green:
Rice Time, Cantonese, ambient, 300g pot 1
Rice Time, Medium Curry, ambient, 300g pot 4½
Rice Time, Sweet & Sour, ambient, 300g pot Free
Rice Time, Mexican Chilli, ambient, 300g pot 1½
Rice Time, Spicy Tikka Masala, ambient, 300g pot 5½
They will all be 1 syn per 20 calories on red as rice is not a free food on red.